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Finding the Fourth Proportional to 639,508.36, 882,521.68 and 353,028.64

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Solution

The fourth proportional to 639,508.36, 882,521.68 and 353,028.64 is: 487,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,508.36 : 882,521.68 = 353,028.64 : x
  2. Step 2: Convert to fraction form
    639,508.36/882,521.68 = 353,028.64/x
  3. Step 3: Cross multiply
    639,508.36x = 882,521.68 × 353,028.64
  4. Step 4: Simplify right side
    639,508.36x = 311,555,428,460.92
  5. Step 5: Solve for x
    x = 311,555,428,460.92/639,508.36
  6. Step 6: Final answer
    x = 487,179.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.